Source file: docs/models/technogym-pure-strength-linear-leg-press.md · rendered from the repository
Technogym Pure Strength Linear Leg Press (MG7500)
Status: Parametric – formula ready, inputs must be measured
Confidence of outputs: estimated · method: mechanical-model · built: 2026-10-17
Mechanism: incline sled model (starting resistance + plates × sine of the sled angle, plus rail friction)
Model
F = SR + P·sin(θ) ± friction
Why no full numeric estimate: Sled angle θ is not published; without it the plate contribution P·sin θ cannot be computed.
Inputs
| Symbol | Input | Value | Status | Uncertainty | Source (verbatim quote) |
|---|---|---|---|---|---|
| SR | Starting resistance without plates Note: Technogym also states "a constant load profile", consistent with a straight sled (force independent of ROM). |
46 kg | ✅ sourced | ± 0.5 — rounding of "46 kg" | manufacturer_page: “46 kg | 101 lb (without plates)” · retrieved 2026-10-17 |
| θ | Sled travel angle to horizontal Note: Not published. The angle figures on the product page are the BACKREST angles, not the sled angle. The catalogue picture is a perspective photo, not a dimension drawing, so no angle was measured from it. How to measure: Phone inclinometer on the guide rail, 3 readings. |
— | 📏 to measure (Maxime) | — | — |
| μ | Friction coefficient How to measure: From the difference between lifting and lowering readings (protocol §4). |
— | 📏 to measure (Maxime) | — | — |
| P | Plates added (label) | — | ⚙️ user setting | — | — |
Validation by Maxime
Follow docs/protocole-mesure-fr.md. Geometry/ratio to measure: θ, μ. Once measured, the inputs are entered and the curve is computed with the same code (research/models/build_models.py).